I worked for a reinsurance company and their main pricing tool is a huge brittle excel file full of spaghetti VBS code. And yet, they manage to underwrite billions.
When the derecho came through Iowa and many businesses were out of power for up to multiple weeks, the very large organization I was working for at the time in the insurance space got to discover just how many of their processes relied on machines sitting under people’s desks. Business critical servers and processing just chilling on a PC under someone’s desk. Also tens of billions of dollars in revenue a year.